Plate-valve



W. PHELLWITZ. PLATE VALVE.

APPLICATION FILED JLFNE I3. 1917.

Patented Sept. 16, 1919.

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A? l/VVE/WOR AX/7W y ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM PRELLWITZ, OF EAS'ION, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PLATE-VALVE.

Specification of Letters Patent. Patented Sept, 16, 1919.

Application filed .Tune 13, 1917. Serial No. 174,514.

To all whom it may concern:

Be it known that I, WILLIAM PRELLWITZ, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Plate- Yalves, of which the following is a specification.

This invention relates to plate valves for compressors and in particular to means for guiding and yieldably supporting them.

The objects of my invention are to provide a guiding and supporting means for plate valves adapted for compressors which will allow a high lift of the valve plate with a consequent large area of valve opening without unduly straining the parts of the guiding and supporting plate, and also to positively seat the valve plate in exactly the same position on the valve seat after each lifting of the valve.

With these and other objects in view, my invention consists in the features of construction and operation set forth in the following specification.

In the drawing attached hereto and forming a part hereof,

Figure 1 shows a plan View of a valve with cover plate removed having one of the modifications of my improved guiding means attached thereto.

Fig. 2, a cross sectional View through the line 2-2 of Fig. 1, showing the valve complete.

Fig. 3, a plan view of a modified form of my invention.

Fig. 4:, an elevational view of the form shown in Fig. 3; and

Fig. 5, a plan view of another modified form of the invention.

Referring more particularly to the drawings, 1 shows the valve seat having a series of annular ports 2 which may be of any desired number, the one selected for illustration being shown as having four. The cen-' tral portion of the valve seat 1 forms a supporting member for the valve plate 3 and cover piece 4, the cover plate and valve seat heing held rigidly together by means of a stud 5 which also holds in position the central portion 7 of the guiding means 6. The guiding and flexible supporting means 6 comprise curved or arc-shaped flexible arms 8 formed upon projections of the central portions 7, and in the preferred modification shown in Fig. 1 an annular section forming an outer rim by means of which the guiding and supporting means are attached to the valve plate 3. In order to permit reatly increased lift of the valve plate 3 rom the seat plate 1 without unduly straining the guiding and supporting memher 6, the curved or arc-shaped flexible portions 8 of the guiding and supporting plate 6 are corrugated throughout substantially their entire length. This construction of the flexible port-ions of the guiding member permits a greatly increased flexure between the central portion 7 and outer rim 9 of the guiding plate 6 without any increase of strain in the flexing portions and thus rendcrs possible an increased lift. While the outer rim 9 of the valve guiding and supporting plate 6 may be permanently attached to the valve plate 3 in any convenient manner, the preferred method is to weld the parts together by electric or spot welding as shown at 10, which has no effect upon the composition of the steel forming the outer rim of the guiding plate 9 and the valve plate 3.

Figs. 3 and 4 show a slight modification of the guiding plate shown in Fig. 1. In this modification the guiding and supporting member 6 is provided with a central portion 11 to which are attached arms 13 extending from projections of the central portion 11 which are corrugated in order to increase their flexibility and to allow an increased lift without an increased straining of the parts of the guiding plate. The'free ends of these arms 13 whlch are arc-shaped similar to arms 8 in Fig. 1 instead of joining an outer rim as shown in Fig. 1 are welded or otherwise permanently attached directly to the valve plate 12 as shown at 14:.

A third modification is shown in Fig. 5, this valve plate 15 being made in a manner similar to that shown in the patent to Rogler, No. 921,892 granted May 18th, 1909, with the exception of the flexible portions 17 which are integral both with the valve portion 15 and the central portion 16 and are corrugated throughout their length. By this means the flexibility of the guiding arms 17 which are also arc-shaped is greatly increased without increasing the strain upon any of the parts and in addition the guiding and supporting means are formed integrally with the valve plate without any increase in the weight of the movable parts of the valve.

In each of the modifications shown in this application the corrugated arms 8 may be thlnned considerably in comparison to the central portion of the guiding member 7 or of the annular valve sections 3, 12 or 15, and it is to be understood that while the present showing and description disclose only certain specific embodiments of my present invention, other forms and modifications are included within the spirit and scope of the same, as expressed in the appended claims.

What I claim is:

1. In a valve for compressors, a valve plate, a guiding member therefor, said guiding member having a central portion adapted to be rigidly secured to a supporting member and flexible arc-shaped corrugated arms extending from said central portion and attached at their outer ends to the valve plate.

2. In a valve for compressors, a valve plate, a guiding member therefor, said guiding member having a central portion adapted to be rigidly secured to a supporting member, and flexible arc-shaped corrugated arms extending from said central portion and joining an annular portion attached attached to said valve plate.

3. In a valve for compressors, a valve plate, a guiding member therefor, said guiding member having a central portion adapted to be rigidly secured to a supporting member, and flexible arc-shaped corrugated arms extending from said central portion and joining an annular portion attached to said valve plate upon its upper surface.

In testimony whereof, I have hereunto set my hand.

' WILLIAM PRELLWITZ. 

